Capital efficiency is still one of the biggest unlocks left for DeFi. @3janexyz takes a pretty interesting approach to pushing it further with a new primitive called Levered Callable Capital (LCC), designed around a simple question: Why should 100% of committed capital need to be prefunded when only a fraction of it may actually be required at any given time? If a lender commits $100m but only $30m is currently drawn, having the remaining $70m sitting idle creates enormous cash drag. LCC introduces a different model. Instead of depositing the full amount upfront, capital providers post a fraction of their commitment as yield-bearing margin, while committing to provide the full capital if called. To make this easier to understand, here’s a simple example: With a 7.5% margin ratio, $75k of posted margin can back $1m of callable capital while the full $1m standby commitment remains productive in your custody (until it’s actually called). And here's where the economics get pretty interesting: At launch terms, LCC is designed to generate ~20% APY on the posted margin, coming from: 1️⃣ the margin asset's underlying base yield (+3.5% APY) 2️⃣ a standby fee for keeping capital available (+16.7% via 125bps on standby notional) Note: If the capital is actually called, the staker also receives a separate funding bonus. So you're effectively getting paid to keep a credible balance sheet commitment available, without having to pre-fund 100% of it from day one. If the facility actually needs liquidity, 3Jane issues a capital call and the staker funds the required USDC within a defined window. That funded capital then becomes USD3 exposure, subject to a 35-day cooldown. Failure to meet the call would result in margin being slashed and a backstop auction is used to source replacement capital. So 3Jane gets something incredibly valuable: Execution certainty without requiring 1:1 prefunding. And capital providers get compensated for providing that certainty without leaving the entirety of their committed capital sitting idle. In many ways you're effectively selling a liquidity option, where you: 🔸 keep uncalled capital productive 🔸 earn ~20% APY on posted margin for standing ready 🔸 receive additional compensation if called 🔸 deploy the full capital only when it is actually required This essentially mirrors to how TradFi has relied heavily on callable commitments, revolvers and unfunded capital commitments forever. What's interesting is bringing that structure onchain through a programmable system that potentially creates an entirely new level of capital efficiency for onchain credit. DeFi doesn't necessarily need more capital, it needs better ways to use the capital already here. IMO, we'll increasingly see onchain credit evolve away from purely fully-funded liquidity toward more credible, programmable balance-sheet commitments. LCC is a pretty interesting step in that direction. Feel free to check it out for more details 👇